YL 105x YL1050 & YL1052 - YL1055, YL1056, YL1057,YL1058
Metal-ceramic transmitting tetrode up to 1215 MHz.
Matrix-Oxide cathode indirectly heated.
Capacities of YL 105x tubes 

Electrodes	minimum	normal	maximum	Cap.
cathode-grid1	38	42	46	pF	YL1055-58
cathode-grid1	32	36	39	pF	YL1050/1052
cathode-grid2	1.9	2.2	2.5	pF	YL1055-58
cathode-grid2	1.55	1.9	2.25	pF	YL1050/1052
cathode-anode	.	0.005	0.011	pF	YL1055-58
cathode-anode	.	.	15	fF	YL1050/1052
grid1-grid2	50	60	64	pF	YL1055-58
grid1-grid2	46	52	58	pF	YL1050/1052
grid1-anode	.	0.05	0.06	pF	YL1055-58
grid1-anode	.	.	90	fF	YL1050/1052
grid2-anode	7.5	8	8.8	pF	YL1055-58
grid2-anode	7.5	9.5	11	pF	YL1050/1052
total weight  1.1 kg